Loxopus dodecius Santos et Aguiar, 2014

Santos, Bernardo F. & Aguiar, Alexandre P., 2014, Review of Loxopus Townes (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of six new species, Journal of Natural History 49 (31), pp. 1905-1935 : 1920-1922

Loxopus dodecius Santos et Aguiar , sp. nov. ( Figures 2B , 3B, 5B, 7A, 7F, 8B)

Female

Fore wing 5.88 mm long. Head ( Figure 7A ). Antenna with 26 flagellomeres. CWH 1.71; CWW 1.67. MLW 2.02; MWW 0.50. MSM 0.64. Median line on supraantennal area faint, almost indistinct. Mesosoma . Pronotum with distinct, short striae along posterior margin of collar, from laterocentral area to ventral corner. Scutellar carina in lateral view distinct on the anterior 0.3–0.4 of scutellum. Subalar ridge very narrow, dash-like; epicnemial carina restricted to ventral 0.70 of mesopleuron, irregular. Transverse furrow at base of propodeum with distinct striae. Metapleuron finely punctate; juxtacoxal and pleural carinae absent. Fourth tarsomeres lateral lobe 2.8 × as long as mesal lobe. Anterior margin of propodeum medially weakly concave; SWL 1.64; posterior transverse carina complete, medially moderately arched forward, sublaterally forming weak but distinct crests. Fore wing vein 1-Rs + M approximately straight, crossvein 1m-cu uniformly and slightly curved, shorter than 1- Rs + M, limit between veins almost indistinct; crossvein 1cu-a arising basad of base of 1M + Rs by about 0.3 of its own length; veins 2cu-a and 2-Cu aligned; bulla of crossvein 2m-cu placed on ventral 0.5; APH 0.51; AWH 1.09. Hind wing vein 2-1A absent; HW1C 1.18. Metasoma. T1LW 2.38; T1WW 2.29; T1 approximately rounded ventrolaterally; dorsolateral carina complete, moderately strong, weaker anteriorly; ventrolateral carina absent. T2LW 0.82; T2WW 2.26; T2–8 sparsely pilose, finely punctate. OST 0.6; ovipositor slightly downcurved; dorsal valve without nodus, preapical notch present but very weak; ventral valve tip with 12 oblique ridges ( Figure 5B ).

Colour. Head black and whitish, mesosoma and legs ferruginous, metasoma dark brown and white. Head: black; scape dorsally dark brown (102,067,048), ventrally ferruginous; pedicel with elongate white spot, remainder of pedicel and first flagellomeres brown, getting darker toward apex; dorsal portion of f5–11 and apex of f12 white; supra-clypeal area, clypeus, mouth parts, base of mandible and malar space, gena and orbital band on supra-antennal area and vertex, whitish (238,224,200); apex of mandible blackish. Mesosoma : ferruginous (125,073,047); propleuron, collar, short dash on dorsal margin of pronotum, tegula and subalar ridge, ventral 0.5 of mesopleuron, apical 0.4 of scutellum, dorsal division of metapleuron, apical 0.4 of metapleuron, transverse marks over propodeal crests whitish. Legs: ferruginous, generally darker towards apex; fore and mid coxae and trochanter white, mid trochanter with fore and hind black spots; apical tarsomeres brown; hind coxa with fore and hind portions white, lateral part with broad, dark brown mark; hind femur ferruginous, ventrally whitish; tarsomeres 2–4 white, apical one dark brown. Wings hyaline, fore wing with dark spot covering apical part of cells 2 + 3M and 1 + 2R. Metasoma: T1 ferruginous, apical 0.3 white; T2–3 dark brown, lighter apically, with buff whitish areas laterally; T4 whitish; T5–8 ferruginous, T7 with white apical stripe; ovipositor reddish orange (116,069,034); sheaths dark brown.

Male

Similar to female, except for the following: antenna with 25 flagellomeres, with or without white band (n = 2); fore wing 4.12–5.26 mm; 1cu-a ending closer to base of 1M + Rs; posterior transverse carina of propodeum almost straight and not forming sublateral crests; spiracle on T1 slightly prominent; SWL 1.33–1.50; T1LW 3.68–3.11; T1WW 1.41–1.50.

Variation

Fore wing 5.10–6.35 mm long. Antenna with 26–27 flagellomeres; gena sometimes dorsally blackish, but never reaching anterior margin of eye; area in front of anterior transverse carina of propodeum sometimes dark, blackish; brown areas of metasoma sometimes darker, blackish, always darker basally.

Comments

Very similar to L. exius sp. nov., from which it can be differentiated mainly by having 12 teeth on the ventral valve of the ovipositor (versus six), and by the colour pattern of the mesosoma , with T2 having white areas laterally (versus entirely dark brown), T3 dark brown (vs. white), and T4 white (versus dark ferruginous). Additionally distinguished from L. exius by the gena mostly white (versus completely black), scutellar carina distinct only on anterior 0.3–0.4 of scutellum (versus 0.5–1.0), and dorsolateral carina of T1 moderately strong (versus weak).

Etymology

Latinized form of the Greek dodeka, meaning twelve; in reference to the 12 teeth in the lower valve of the ovipositor.

Material examined

24 ♀♀, 2 ♂♂. Holotype ♀ from BRAZIL, Espírito Santo, Cariacica, Reserva Biológica de Duas Bocas , Pau Amarelo, Pt. 14, 25–27 October 2005, yellow pan traps, A.P. Aguiar et al. ( UFES). Mounted on triangle point. In good shape.

Paratypes: BRAZIL: Minas Gerais: 1 ♂ from Parque Estadual do Rio Doce, Trilha do Vinhático, mata secundária alta [high secondary forest] Pt. 2, 24 October 2002, Malaise trap, J.C.R. Fontenelle. Espírito Santo: 1 ♀ from Cariacica, Reserva Biológica de Duas Bocas, Pt. 1, 25–26 April 2005, yellow pan traps, A.P. Aguiar et al; 1 ♀, same data except Pt. 5, 29–30 April 2005, 1 ♀, same data except Pau Amarelo, Pt. 12, 23–25 October 2005; 2 ♀♀, same data except Pt. 13; 3 ♀♀, same data except Pt. 17; 1 ♀, same data except Pt. 3, 26–28 October 2005; 1 ♀, same data except Pt. 21, 27–29 October 2005. 1 ♀ from Guarapari, Parque Estadual Paulo César Vinha, 20°36 ′ S, 40°25 ′ W, 4 m, Pt. 5, 8–15 May 2006, R. Kawada; 1 ♀, same data except Pt. 35; 1 ♂, same data except Pt. Clusia 40; 2 ♀♀, same data except Pt. 66; 1 ♂, same data except Pt. 2, 9–16 November 2006, Malaise trap, B. Araújo and M. Santos; 1 ♀, same data except Pt. 8; 1 ♀ from Santa Maria de Jetibá, Fazenda Clarindo Kruger, Pt. T6, 29 November–6 December 2002, Malaise trap, M.T. Tavares. 2 ♀♀ Santa Teresa, Estação Biológica de Santa Lúcia, 9 May 2008, yellow pan traps, M. Tavares, C. Azevedo et al; 3 ♀♀, same data except 9–13 May 2006. Rio de Janeiro : 1 ♀ from Guanabara [currently state of Rio da Janeiro ], Represa do Rio Grande , VI.1966, Alvarenga ( AEIC).

Distribution

Brazil (MG, ES, RJ) ( Figure 8B).

Figures

Figure 2. Diagnostic features for the genus. (A,B) clypeus; (A) L. multicolor; (B) L. dodecius. (C,D) L. australis; (C) wings; (D) hind t4.

Figure 5. Ovipositor apex. (A) L. australis; (B) L. dodecius; (C) L. duckei; (D) L. exius.

Figure 7. (A,B) Head, frontal view. (A) L. dodecius; (B) L. ichilus (C-E, G) Mesosoma, lateral view. (C) L. duckei; (D) L. australis; (E) L. ichilus; (F) L. docedius male, propodeum; (G) L. exius; (H) L. multicolor, metasoma.